When starting a chainsaw you should always ensure to heed all safety precautions. Never start the saw engine without the bar, chain and clutch cover (chain brake) assembled - or else the clutch can come loose and cause serious injuries. Always move the saw away from the fuelling area before starting. Place the saw on clear ground and ensure that the chain is not in contact with anything. Also, ensure that you have a secure footing. Keep people and animals well away from the working area.